Prevent excessive application. When the concentration of zinc is appropriate, it can promote the growth of crops. The effect of too low is not obvious. If it is too high, it will have a toxic effect on crops or affect the health of humans and animals. When zinc is used as the base fertilizer, it is generally applied with 1 to 2 kilograms of zinc sulfate per acre. When used as a top dressing, it is applied with 0.75 to 1 kilogram per acre. Spraying outside the roots, 90-180 grams of zinc sulfate per acre is sprayed on 60 kilograms of water on sunny days. Spraying corn should be carried out at the seedling stage, rice from tillering to flowering stage, wheat at jointing stage, celery and spinach at the seedling stage. Alkaline soil can be appropriately increased in amount.
Prevent application with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer. However, depending on the soil condition, the application of phosphorus and zinc fertilizer is increased according to the soil condition. .
Prevent mixing with alkaline fertilizers and alkaline pesticides. Zinc is mixed with alkaline fertilizers such as lime, ash, and ammonia to form acidic ions, which react with alkaline ions to reduce fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
Prevent application with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer. However, depending on the soil condition, the application of phosphorus and zinc fertilizer is increased according to the soil condition. .
Prevent mixing with alkaline fertilizers and alkaline pesticides. Zinc is mixed with alkaline fertilizers such as lime, ash, and ammonia to form acidic ions, which react with alkaline ions to reduce fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
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